Field Day 4: Today, the children learn, then look for fishing cats. [PHOTOS]

Radio tracking is hardcore business. You have to monitor the cat every three hours, day or night, rain or shine. And these collars are designed to last for a year. Unless you want to develop a serious case of the crazies, that’s when it’s helpful to enlist some extra help, in this case, a few of the neighborhood kids.

After giving the kids a primer on how to triangulate a radio-collared fishing cat, she puts them to the test. Each “student” must use a set of GPS coordinates, geometry and satellite images to locate the hypothetical radio-collared fishing cat. Next up is a trip into the field to locate a real fishing cat.

An impassible ditch becomes passable, thanks to a little ingenuity by Namfon. The radio signal indicates a fishing cat is nearby.

Namfon searches for the signal of a recently collared female. Yesterday, they tracked her to this shrimp farm. Namfon is worried that the collar may have slipped off, as the signal indicates the cat hasn’t moved since last night.